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Finding the Fourth Proportional to 71,009,990.60, 106,514,985.90 and 51,878,114.60

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Solution

The fourth proportional to 71,009,990.60, 106,514,985.90 and 51,878,114.60 is: 77,817,171.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,009,990.60 : 106,514,985.90 = 51,878,114.60 : x
  2. Step 2: Convert to fraction form
    71,009,990.60/106,514,985.90 = 51,878,114.60/x
  3. Step 3: Cross multiply
    71,009,990.60x = 106,514,985.90 × 51,878,114.60
  4. Step 4: Simplify right side
    71,009,990.60x = 5,525,796,645,137,585
  5. Step 5: Solve for x
    x = 5,525,796,645,137,585/71,009,990.60
  6. Step 6: Final answer
    x = 77,817,171.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.